<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    body{
      margin: 0;
      display: flex;
      align-items: center;
      justify-content: space-around;
      height: 100vh;
    }
    pre{
      padding: .5em 0;
      line-height: 1.5em;
      background: linear-gradient(rgba(0,0,0,.1) 50% ,transparent 0) 0 0 / auto 3em content-box, beige;
      /* background: beige;
      background-image: linear-gradient(rgba(0,0,0,.1) 50% ,transparent 0);
      background-size: auto 3em;
      background-origin: content-box; */
    }
  </style>
</head>
<body>
<pre><code>while (true) {
  var d = new Date();
  if (d.getDate()==1 &amp;&amp;
      d.getMonth()==3) {
    alert("TROLOLOL");
  }
}</code></pre>
</body>
</html>